Different ways of creating Objects
  • Using new operator.
  • Using Class.forName() and newInstance().
  • Using Factory Methods
  • Using Object cloning
  • Using Object deserialization
Object Creation By Different Methods
public class ObjectCreation {

public static void main(String args[])throws Exception{

ObjectCreation objecByNewKeyword = createObjecByNewKeyword();
ObjectCreation objecByClassForName = createObjecByClassForName();
ObjectCreation objecByCloning = (ObjectCreation)createObjecByCloning(); // object to be cloned

objecByNewKeyword.show("new keyword");
objecByClassForName.show("using Class.forName and newInstance");
objecByCloning.show("cloning");

}


public static ObjectCreation createObjecByNewKeyword(){

ObjectCreation obj = new ObjectCreation();
return obj;
}


public static ObjectCreation createObjecByClassForName() throws ClassNotFoundException, InstantiationException, IllegalAccessException{

ObjectCreation obj = (ObjectCreation)Class.forName("ObjectCreation").newInstance();
return obj;
}


public static ObjectCreation createObjecByCloning()throws CloneNotSupportedException{

ObjectCreation obj = new ObjectCreation();
ObjectCreation clone = (ObjectCreation)obj.clone();
return clone;
}

public void show(String msg){
System.out.println("I am an Object created by " + msg);
}

}

Output of the above program
I am an Object created by new keyword
I am an Object created by using Class.forName and newInstance
I am an Object created by using cloning